Grinding machine



Aug 8, l933-l L. B. s'roGNER 13,921,333

GRINDING MACHINE Aug. 8, 1933. l.. B. s'roGNl-:R

GRINDING MACHINE Filed June 5, 1932 3 sheets-sheet 2 MT .NM

5 Sheets-Sheet 5 Y y M bm. kN .WM Sw 3 f W y@ Aug. 8, 1933. L, B,sToGNl-:R

GRINDING MACHINE Filed'June 5, 1952 BOY PATENT OFFICE 1,921,333 GaiNDINGMACHINE Lawrence B'Stogner, 'HartsvillegLS C., assigner -to SonacaProducts Company, Hartsville, S. C.,k a Corporation of South Carolina lApplication AJune 3, 1932. Serial No. 615,236 l j '10. claims. (o1. 5in-241) This invention'relates to grinding' maclfiinesv and moreparticularly to portable grinding machines of the type Aadapted to beapplied to various kinds of apparatus ferthe purpose of grinding or'abrading, in-situ, certain elements thereof, the

detachment orreniov'al of which, forthis purpose,

would be imrn'acticable.4

The general object of the invention is to pro- -vide a novel andimproved device of this character which is'simple and compact inconstruction, easy' to manipulate, and accurate in operation.

in its preferred embodiment, the invention contemplates the provision ofa smallV portable machine provided with rotaryabrasive membersand asource. of .power for driving them, which machine is particularlyadapted for application to the drawing rolls of a spinning frame.

As is well-known in .the art, drawing rollsof the type commonly .used inYthis connection are arranged in pairs, one of each pair disposed abovetheotherfthe lower onesbeing positively. driven bymeans of suitablegearing and the upper onesl generally being driven by frictionalcontactwith, the bottoni rolls.A The bottom rolls are made of steel andcomprise a series offiuted portions each separated from the vnextadjacent portion by necks of less diameter than the fluted portions,

Theseoperative portions of the bottom rolls are fiutedorvlongitudinallyslotted for Vthe purpose of aiding the bottom rolls inobtaining a better grip on the cotton as it passes-between them and thetop, rolls. The top rolls are also ofmetal and are generallymade inshort lengths andtassembledv end to end. Those portions ofthe top rollswhich lievadjacent the fluted portions of the bottom rolls are providedwith cylindrical cork covered cots which are adapted to provide elasticsurfaces ofv contactforthe cotton fibers passing between the rclls.-k`After,continued operation of these drawing rolls, the cork surfaces ofthetoproll cots becomel worn by contact with the cotton and the iiutedbottom rolls, and it is necessary to periodically grind orbuff thesecots in order to resurface them.

Itis, therefore, a more particular object of the present invention toprovide a `portableA power dri-yen grinding machinewhich is well adaptedto accomplish the resurfacing of these top roll cots and` whichcomprises' a novel clamping frame by means of which the devicemay betransported andmay be temporarily seeured'to the b'o'ttem rolls'of thespinning frame. vThe devicealso.in--

cludes means for bringing the buiing or grinding element into contactwith ,the surface of top roll cots with thedesired degree of pressure toeffect the proper abrading etion,andadiust-` able means formovably'supporting a motor for driving the grinding elements..

Other objectsV and features of novelty will be apparent from. thefollowing specification when read in connection with the accompanyingdrawy ings in which, one embodiment of my invention is illustrated byway of example.

In the drawings: v i.

Figure 1 is a view in side elevation of a grinding device embodying theprinciples of my invention and showing the device applied to a pair ofdrawing rolls of a spinning framathese rolls being shown in verticalcross-section:

Figure 2 is aplan View of my improvedgrinding device with the drivingmotory omitted;V

Figure 3 is a transverse cross-sectional View taken on line3-3ofFigure'1; y

Figure 4 is a transverse cross-sectional view taken on line 4,-4 ofFigure l; v l

Figure 5 is a longitudinal cross-sectional View 75 Figure '7.fis avfragmentary side elevation shoW- 80;.

ing the grinding machine appliedto a spinning. frame' and illustratingthe manner in which. the grinding wheel may be'brought to bear upon anyone of the. upper rolls. j

Referring particularly to Figure 1 of the draw- 85 f' ings,'the numeral10 indicates thelower fluted. roll of a pair of drawing rolls of aspinning frame. The correspondingupper roll is indicated at 11 and isprovided with the corklcovered cot'12. The section through thev bottomroll 10 is taken at 90 onev of the neck portions thereof which occurbetween the fluted sections which are adapted to contact with vthe toprolls. YU.The section through the top roll, however, is taken at a pointwhere the drawing action occurs, and theroll is shown in Contact withthe buiiing or grinding wheels 15.

Themain frame-of the'grinding machine, t-l gether with its variousadjustment features, is shown most clearlyin Figure 6 of the drawingsand is indicated generally by the letter A. The mainframe A comprisesessentially thecomfbination of elements which will now be defr scribed.The rearwardly yextendingA hand1e20 is provided with bifurcations 21ywhich extend alf lmost tothe front end of the machine. A forward handleor bail 25 is adapted to straddle the front L ends of the bifurcations2l and is provided withy downwardly and forwardly extending arms 26.which are secured to the members 21 by means f of the connectingelements 27. vThe 'lower ends .1-10

g wheels l5.

are fulcrumed upon the bolts and 61 which 60' are secured to the sidebars 50Yand 51 respectively.

- and 51, as clearly shown at 63 and 64.

of these arms 26 extend forwardly in a direction parallel to the members21 and are provided with openings for the reception of the forward crossrod 28. A rear cross rod 29 also passes through openings in the members21 as at 30. Two outer frame members 3l and 32 are mounted on the crossvrods 28 and 29 for lateral adjustment and at their forward ends areprovided with jaws 33 and 34 which are adapted to receive the bottornrolls 10 as shown in Figures 1 and 5 of the drawings.

The lateral adjustment of these side frame jaw members 31 and 32 isaccomplished by means of the rotatable cross bolt 35, the ends of whichare provided with threads of opposite hand. The bolt 35 is provided atits mid-portion with the knurled wheel 36, the hub portion 37 of whichis adapted to rotate between the arms 21 of the handle portion 20 of themain frame. It will be readily understood that rotation of the shaft 35in 'one direction will cause the lower jaw members 33 and 34 to approacheach other and that rotation in theopposite direction will cause them torecede. This adjustment permits the application of the device to bottomrolls, the fluted portions of which may be of varying lengths.

A pivoted upper jaw member 40 is fulcrumed upon the cross rod 28, andits rearwardly extending shank 41 is positioned below the main frame andhas its rear end secured to an upwardly directed actuating lever as atThe shank 41 is bifurcated, as shown in Figure 3, in order to receivethe lower portion of the lever 42 and the extension 44. A coil spring 45is adapted to connect the portion44 with a cross pin 46 which extendsbetween the elements 21 of the main frame. It will be readily seen thatthe spring 45 continually urges the lower jaws 33 land 34 andthe upperjaw 40 toward each other which are pivotally secured to the outer mainframe members 81 and 32 as by means of the bolts 52 and 58. The upwardlyand forwardly projectingends ci these bars 50 and 51 are provided withadjustable extensions 54 and 55 which are adapted to carry the bearings56 and 57 within which is received the axle 59 of the grinding Theseforward extensions 54 and 55 j The rear endsof the members 54 andr 55are 'turned upwardly' and inwardly so as toY overlie the upper edges oftheir Vassociated members 50 Set screws 66 and y67 are threaded throughthe inwardly extendingl portions of the members 54 and 55. and theirlower ends arejadapted to bear upon the top edges oi" the bars v50 and51. These set screws are providedvwith knurled heads for aiding inrotating them, the linurled lock nuts 68 and 69 are adapted to securethe set screws in their adjusted positions. AV spring-70 is adapted tourge the rear ends of the members 54 andA 55 downwardly and thus urgethe vadjacent endof ,the axle 59 upwardly. This tendency may becounteracted by the proper adjustment of either of the set screws 66 or67, and by this means the proper level or parallel position of thegrinding wheels 15 may be obtained.

The rear portions of the bars 50 and 51 of the pivoted grinding wheelcarrying frame B are adapted to extend below the main frame andterminate in the return bent portions 72 and 73. Both the main rearportion of the bars 50 and 51 and these return bent portions 72 and 73are provided with openings to receive the cross bar 75. Outwardly of theside frame members 31 and 32, there are positioned on the rear crossshaft 29 the sleves 77 and 78 which may be secured to these members 31and 32 and which provide stops or abutments for the rear portions of thebars 50 and 51 of the pivoted wheel carrying frame.

An operating handle or lever 80 is provided with forwardlyextendingbifurcated portions 81 and 82, the forward ends of which areprovided with openings through which is adapted to extend the rear crossrod 29 of the main frame. Intermediate the ends of this bifurcated lever80 is pivotally suspended the U-shaped link 85 as by means of the bolts86 and 87. The arms of the link 85 near the bottom portion of the linkare provided with openings through which the centrol portion of thecross bolt is adapted to be received. This provides a pivotal connectionbetween the operating handle and the pivoted grinding wheel carryingframe B.

The arrangement for supporting the driving means for the grinding wheels15 will now be described. A mo'tor carrying frame C is provided whichcomprises a vertically extending bracket 90 to which is suitably securedthe motor 91 having a vertically disposed armature shaft 92, upon thelower end of which is iiXed the pulley 93 about which passes the belt 95which extends forwardly of the apparatus and around the pulley 96 whichis secured to the axle 59 of the grinding wheels 15. The lowerportionrof .the motor supporting Vframe C comprises the two spaced arms98 and 99 which are pivotally connected to the arms 21 of the main framehandle 20 as at 100 and 101.

It is obvious that the motor carrying frame C must partake ofsubstantially the same movements as thev grinding wheel supporting frameB in order to maintain the operative driving connections, and thefollowing adjustable means is yoke 105 having a central downwardlydepending portion 106 is pivoted at its ends to the members 98 and 99 ofthe motor carrying frame C. The portion 106 is provided with an openingwhich is adaptedto receive the bolt 107, the lower end of which'isprovided with the sleeve portion 108 adapted to receive the shaft 75which forms the part of the connection between the pivoted frame B andthe actuating handle 80. A nut 109 is threaded upon the bolt 107 abovethe yoke 105, and by rotating this nut, the proper relative positionsVoi the frames B and C may be obtained. A coil spring 110 surrounds theshank of the bolt 107 and is adapted to be compressed between thedepending central portion 106 of the yoke 105 and the sleeve portion 108of the bolt 107. In prac` tice, after thebelt 95 has been applied to thepulleys 93 and 96, the nut 109 is rotated to a position to apply theproper tension to the belt 95, and the coil spring 110 provides thenecessary resilience in preventing undue strain upon the belt duringoperation.

A bolt 112 is threaded through the handle 20 of the main frame A, andthe lower end thereof Vprovided for maintaining this relationship. A

is adapted to provide a stop orabutment for the handle in order to limitthe downward movement of the grinding wheel 15. Y

The application and operation of the device will be readilyunderstood..V The machine should be grasped by the forward bail handle25 with one hand, and the levers 20 and 80 are gripped with the otherhand.V In order' to open "the clamping members of the main frame, thehandle 42 is'depressed by applyingipressurewith the thumb to the upperend 47 thereof. This, of course, will raise the upper jaw member 40 andpermitthe application of the lower jaws 33` and 34 tothe neck portionsofthe bottom rolls 10. Upon release of the handle 42, 4'7,y the upperjaw 40 will come intogripping contactwith the bottom rolls either ata'neckjportion thereof or against the iiuted portion itself. The machineis nowtem-v porarily attached to the spinning frame. for operation.VNext, the grinding wheels V1,5 are ad-A ljusted; so that-their axle 59Vis parallel with the axis of the top rolls ll, by means of the setscrewsl 66 and,67. Then the grinding wheels. 15 are brought into propercontact with vthe surfaces. of the top rolls vby an upwardjmovernent'ofthe lever 8G; The motor 91, which is adaptedyto receive its current froma suitable source, is then started, and the abrading or resurfacingoperation may be readily effected. y

Figure 7 illustrates clearly-the application'of the grinding machine toaspinning frame, whereby not only the first upper -roll cots may beresurfaced but also those of the` other upper rolls of the series.

the machine is raised aboutthis pivot at'the same time that the grindingwheelsare moved-upwardly about their pivots 53. Itwill thus be seen thatthe wheelsl l5 arefextended over the nearer rollers in order to contactwith those at the rear portion of the frame by suitable manipulation ofthe handles 20 and 80. l

VBy means of the mechanism already described, the main frame may beadjusted laterally to accommodate the attaching jaws thereof to theparticular bottom rolls to which the device is to be applied by meansofthe rotatable shaft 35 which is actuated by the wheel 36. The properbelt tension can also be obtainedby the adjustvment of the connectingmechanism -110.-v

attached toa machine for the purpose of grinding or resurfacing anelement thereofsaid device comprising a main frame, a' pivotally mountedframe carried by said main frame, a grinding member on said pivotallymounted frame, another pivotally mounted frame carried by said mainframe, a motor mounted on said second named pivoted frame, a beltoperatively connecting said motor with said grinding member, a

2. A portable device of the type adapted to be The rst lower roll isretained as the pivotal clamping point for the machine, and f attachedto avimachine for the purpose of grinding or resurfacing. an elementthereof, said device comprising a laterally expansible main frame,`means for effecting expansion and contraction thereof, clamping jawsassociated with said main framefor attachingl the device to a` spect tosaid element, another pivoted frame caryried by vsaid main frame, amotor disposed upon Asaid second named pivoted frame, a beltoperativelyl connecting said motor withsaid grinding wheel, and meansfor. resiliently adjusting the relative positions of saidl movableframes for, movement vin unison and for regulating the tension in saidVbelt.l l

, f 3. A portable grinding machine for resurfacing the top drawing rollsof spinning frames comprising, in combination, a main,` frame,v arearwardlyextendingy handle for-[said main frame, a supplemental framepivoted-to saidmain frame, a grinding device mountedgon saidvsupplemental frame, and a manually operable lever for moving saidsupplemental frame toapply the grinding device to the rolls, themanipulative portion of.Y

said lever being disposed adjacent'V said handle and cooperatingtherewith to provide means for grasping said machine duringoperation'thereof.'

. 4. A portable grinding machine for resurfacing the top drawing rollsof spinning frames comprising, in combination, a main frame, arearwardly extending handley for said main frame, a supplemental framepivoted to said main frame,

-a grinding device mounted on said supplemental frame, a manuallyoperable'lever for moving said supplemental frame to apply thegrindingdevice to the rolls, 'the manipulative portion of said leverbeing disposed adjacent said handle and cooperating4 therewith toprovide means for grasping said Y machine during operation thereof, anda pincerlike clamping device on said main frame for applying the machineto the bottom rolls of said spinning frame.

5. Aportable grinding machine forresurfacing the top drawing rolls ofspinning frames comprising, in combinatioina main frame, a rearwardlyextending handlefor said main frame, a grinding '130.

tool onsaid main frame, and a manually operable pincer-like clampadapted to seize the necks of one of the bottom rolls of the spinningframe for supporting the machine in grinding position.

6. A portable grinding machine for resurfacing the top drawing rolls ofspinning frames, comprising, in combination, a main frame, a rearwardlyextending handle for said main frame, a supplef the top drawing rolls ofspinning frames comprising, in combination, a substantially'rectangular,laterally expansible main frame, a rearwardly extendinghandle for saidmain frame, a supplemental frame pivoted to said main frame, a grind ingdevice mounted on said supplemental frame, and a manually operable leverfor moving said supplemental frame to apply the grinding device to therolls, the manipulative portion of said lever being disposed adjacentsaid handle and cooperating therewith to provide means f for graspingsaid machine during operation thereof.

8. A portable grinding machine for resurfacing drawing roll cotscomprising, in combination, a substantially rectangular main frame whichincludes a longitudinall center bar, a pair of laterally spaced sidebars, transverse rods connecting said bars, clamping jaws formed on saidside bars for receiving the necks of a bottom roll of a drawing framefor supporting said machine in operative position, a cooperatingclamping jaw pivoted to said center bar, a handle on said center bar,means for adjusting said side bars laterally to expand said frame to ntbottom rolls of various contours, a supplemental frame attached to saidmain vframe, and a grinding wheel mounted on said supplemental'frame.

9. A portable grinding machine for resurfacing drawing roll cotscomprising, in combination, a substantially rectangular main frame whichincludes avlongitudinal center bar, a pair of laterally spaced sidebars, transverse rods connecting said' bars, clamping jaws formed onsaid side bars for receiving the necks of a bottom roll of a drawingframe for supporting said machine in operative position, a cooperatingclamping jaw pivoted to said center bar, a 1nandle on said center bar,means .for adjusting said side bars laterally to expand said frame to tbottom rolls of various contours, a supplemental frame pivotedintermediate its length to said main frame, a grinding wheel mountedupon one end of said supplemental frame, a lever pivoted to said' mainframe and extending adjacent said handle, and a link connecting saidlever and said supplemental frame whereby relative movement of saidlever and said handle is adapted to effect the adjustiment of thegrinding wheel with relation to said cots. Y

l0. A portable grinding machinefor resurfacing drawing roll cotscomprising, in'cornbination, a substantially rectangular main framewhich includes a longitudinal. center bar, a pairY of laterally spacedside bars, transverse rods connecting said bars, clamping jaws formedIon said side bars for receiving the necks oi a bottom roll of a drawingframe Vfor supporting said machine in operative position, la cooperatingclamping jaw pivoted to said center bar, a handle on said center bar,means for adjusting said side bars laterally to expand said frame to iitbottom rolls of various contours, a supplemental frame pivotedintermediate its length to said main `frame, a grinding wheel mountedupon one end of said supplemental frame, a lever pivoted to said mainVframe and extending adjacent said handle, a link connecting said `leverand said supplemental frame whereby relative' movement of said lever iand said handle is adapted to eiiect the adjustment of the grindingwheelwith relation to said cots, a second supplemental frame pivoted tosaid' main frame, a motor mounted on said second sup-- plemental frameand operatively connected with said grinding wheel, and a linkVconnecting'said second supplemental frame with said lever where-

